Can not Open Stream in PortAudio Library. Error: Invalid sample rate

Question

Hello,

wireshark Version 1.4.2

My system hardware and audio device:

HP 210 Mini
Fedora 14
2.6.35.10-74.fc14.x86_64
 cat /proc/asound/cards
 0 [Intel          ]: HDA-Intel - HDA Intel
                      HDA Intel at 0x56200000 irq 46
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02)

When I try and play back the rtp after making a sip call. I go to VOIP Calls | Player | Decode | Play. I get the following error message.

Got this info from PortAudio Library:
Default hostApiName: ALSA
Default deviceName: HDA Intel: STAC92xx Analog (hw:0,0) (0)

Can anyone suggest a solution to this problem?

Many thanks for any advice,

===== Device info ======

============================== Default capture device number: 7 Default playback device number: 7 Device ID: 0 Device name: ALSA: HDA Intel: STAC92xx Analog (hw:0,0) Input channels: 2 Output channels: 2 Low Input Latency: 0.011610 Low Output Latency: 0.011610 High Input Latency: 0.046440 High Output Latency: 0.046440 Supported Rates: 44100 48000 88200 96000 192000 Device ID: 1 Device name: ALSA: front Input channels: 0 Output channels: 2 Low Input Latency: -1.000000 Low Output Latency: 0.011610 High Input Latency: -1.000000 High Output Latency: 0.046440 Supported Rates: 44100 48000 88200 96000 192000 Device ID: 2 Device name: ALSA: surround40 Input channels: 0 Output channels: 2 Low Input Latency: -1.000000 Low Output Latency: 0.011610 High Input Latency: -1.000000 High Output Latency: 0.046440 Supported Rates: 44100 48000 88200 96000 192000 Device ID: 3 Device name: ALSA: surround51 Input channels: 0 Output channels: 2 Low Input Latency: -1.000000 Low Output Latency: 0.011610 High Input Latency: -1.000000 High Output Latency: 0.046440 Supported Rates: 44100 48000 88200 96000 192000 Device ID: 4 Device name: ALSA: surround71 Input channels: 0 Output channels: 2 Low Input Latency: -1.000000 Low Output Latency: 0.011610 High Input Latency: -1.000000 High Output Latency: 0.046440 Supported Rates: 44100 48000 88200 96000 192000 Device ID: 5 Device name: ALSA: pulse Input channels: 32 Output channels: 32 Low Input Latency: 0.011610 Low Output Latency: 0.011610 High Input Latency: 0.046440 High Output Latency: 0.046440 Supported Rates: 8000 9600 11025 12000 15000 16000 22050 24000 32000 44100 48000 88200 96000 192000 Device ID: 6 Device name: ALSA: dmix Input channels: 0 Output channels: 2 Low Input Latency: -1.000000 Low Output Latency: 0.042667 High Input Latency: -1.000000 High Output Latency: 0.042667 Supported Rates: 48000 Device ID: 7 Device name: ALSA: default Input channels: 32 Output channels: 32 Low Input Latency: 0.011610 Low Output Latency: 0.011610 High Input Latency: 0.046440 High Output Latency: 0.046440 Supported Rates: 8000 9600 11025 12000 15000 16000 22050 24000 32000 44100 48000 88200 96000 192000

Selected capture device: 7 - ALSA: default Selected playback device: 7 - ALSA: default Supported Rates: 8000 9600 11025 12000 15000 16000 22050 24000 32000 44100 48000 88200 96000 192000 Unable to open Portmixer

======= Edit === After install audacity:

Got this info from PortAudio Library: Default hostApiName: ALSA Default deviceName: HDA Intel: STAC92xx Analog (hw:0,0) (0)

Can not Open Stream in PortAudio Library. Error: Invalid sample rate

Audacity installed:

Name        : audacity
Arch        : x86_64
Version     : 1.3.12
Release     : 0.6.beta.fc14
Size        : 13 M
Repo        : installed
From repo   : updates
Summary     : Multitrack audio editor
URL         : http://audacity.sourceforge.net
License     : GPLv2
Description : ……..

Accepted Answer

The Audacity audio device info gives the following picture:

Wireshark/PortAudio uses the default host api, which is ALSA
Wireshark/PortAudio uses the default device, which doesn't exists (weird bug)
Wireshark learns there's no device, starts enumeration.
Wireshark/PortAudio selects the first host API, ALSA
Wireshark/PortAudio selects the first device, HDA Intel: STAC92xx Analog (hw:0,0)
Wireshark/PortAudio opens a stream: Stereo, 16 bit, 8kHz
As you can see from the Audacity audio device info this device doesn't support rate 8000
Wireshark gives up

How to change the ALSA configuration to give you the right device as the first one I don't know.

The very best way is to put pressure on the PortAudio developers to fix the three years outstanding CRITICAL bug (*)

(*) Yeah it's a rant, but it must be solved at the source, not be worked around by all (audio) developers...

Answer 2

There's something off with the configuration of your audio system.

First off, the PortAudio library has some issues finding your default device, on the default host API. That's a PortAudio lib problem by itself, but Wireshark tries to work around it looking for other host API/device configurations.

It tries to work through the list of host APIs, the first one with devices on them is selected, then the first device on that is selected. An output stream is opened on it, with stereo output, 16 bit samples, 8 kHz sample rate.

Now, your title says: "Invalid sample rate". That strikes me as odd, because the output configuration is trivial in itself.

You could investigate further installing Audacity, and checking how it works the output host API/device options.